*SUPPORT*
IN: zup wif gazzer OUT: BLUE RED
IN: tufa zup fep dax OUT: GREEN BLUE YELLOW YELLOW
IN: gazzer blicket fep blicket tufa wif gazzer OUT: GREEN RED YELLOW RED
IN: zup wif fep OUT: BLUE YELLOW
IN: fep OUT: YELLOW
IN: fep dax OUT: YELLOW YELLOW
IN: tufa fep tufa wif tufa OUT: GREEN YELLOW GREEN GREEN
IN: gazzer dax OUT: RED RED
IN: zup wif zup OUT: BLUE BLUE
IN: fep zup dax OUT: YELLOW BLUE BLUE
IN: tufa blicket zup blicket zup blicket fep OUT: YELLOW BLUE BLUE GREEN
IN: tufa OUT: GREEN
IN: fep wif tufa OUT: YELLOW GREEN
IN: gazzer fep wif gazzer OUT: RED YELLOW RED

*QUERY*
IN: tufa blicket fep zup OUT: YELLOW BLUE GREEN
IN: tufa blicket tufa OUT: GREEN GREEN
IN: fep blicket zup OUT: BLUE YELLOW
IN: tufa wif gazzer OUT: GREEN RED
IN: tufa wif tufa OUT: GREEN GREEN
IN: zup OUT: BLUE
IN: tufa wif zup OUT: GREEN BLUE
IN: fep wif gazzer OUT: YELLOW RED
IN: fep blicket fep OUT: YELLOW YELLOW
IN: zup dax OUT: BLUE BLUE

*GRAMMAR*
gazzer -> RED 
 fep -> YELLOW 
 tufa -> GREEN 
 zup -> BLUE 
 u1 wif u2 -> [u1] [u2] 
 u1 blicket x1 -> [x1] [u1] 
 u1 dax -> [u1] [u1] 
 u1 x1 -> [u1] [x1] 
 